Tapping-machine chuck



-Ma 31 192 y 7 Y A. BURGE TAPPING MACHINE CHUCK 2 Sheets-Sheet 1 Filed April '7. 1926 Zi y v waj f Patented May 31,1927.

[ALFRED BURGE, 0F GARY, INDIANA, ASSIGNOR T0 NATIONAL TUBE OM ANYQA Y CORPORATION OF NEW JERSEY.

TAPPING-MAC HINE CHUCK Application filed April 7,

with an eccentric for moving the section to grip the article to be operated upon. r

This lIlVGIltlQIL also consists 1n certain other features of construction and in the combination and arrangement of the several ofthe device; In these views,- 1 indicates the outer castparts, to be hereinafter fully described, illustrated in the accompanying drawings and spe cifically pointed outin the appended claims. In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the sev- .eral views, and in which a Figure 1 is a plan view of the device. Figure 2 is a vertical sectional view through Figure 1. V Figure 3 is a section on line 33 of Figure 2.

Figure 4 is a tion or' block. Figure 5 shaft. I Fig. 6 is fragmentary view of the movable'sec! ing which is interiorly shaped to'receive the gripper 2 which J is designed to hold the article to be operated upon. There would be a plurality of-thesegrippers, the opening inwvhichwould be of varying diameters .so that various sizes ofobjects can beheld in the device by using the gripper of the size to hold the Object to be operated upon, Each of these grippers is formed with an opening 3. in one end thereof to receive a.

movable block or section 4, the 'curved'part of which forms a movable wall of thegripper so that by moving said-block or section inwardly, an Object willbe clamped by the gripper. .Recesses,v 5 are formed in r p I ing a I support, a gripper arranged therein, said gripper having an opening there1n,,a

the walls of the gripper and inthe block 4 to receive the teeth 6 which engage the object placed in the gripper. Ascrew shaft 7 has threaded engagement in a hole 8 formed in the center of the block and the "outer wall of the block isrecessed, as at 9, to receive a. knurled disk 10 which is attached to the outer end of the shaft 7. A shaft 11 is I rotatably mounted in the casting 1" and has.

is a'view of the eccentric and its 7 bottom plan view 1926. Serial No. 100,444.

for engagement'by a wrench so that the.

shaft.- can be rocked.- A b-ushing l-efis 7 threadedin the casting-1 and holds the ecv centrlcshaft'in position. A cross head15,f

recessed. to receive the eccentric 12, is car. rled by the castlngl and will engagethe outer endof the shaft 7 when it is forced inwardly by the eccentric and thus the block or section 4 canbe movedinwardlyfby turning of the eccentric shaft. The'shaft 7 provides-Ineans for adjusting. the extent. of

movementoftheblock the eccentric.

From theforegoing, it will be seen that if the block 4: can be moved into. clamping position in order to clamp an objectin the device by asimple movement ofthe. eccentric shaft andthe movement of the block can be regulated bythe turning of the, shaft 7 through means of the knurled disk 10. I

The drawings show the-device used on a rotary chuck used for tapping couplings where-the tap isheld stationary, but it will, I

of course, "be understood that the. chuck ta'ted, if desired.

. It is thoughtfrom the I desire itto be understood that. I may 'make changes in the construction and in the combination and arrangement of'the sevl/Vhat I claim is v 1. A device of the class described compristhe support and havlng anopeningtheicin,

'e'ral parts, provided that'such changes-(fall within the scope of the appended claims.

. 0" ing a support, a gripper removablyseated in? a block or section movably arranged in said 7 opening and having a curved inner portion which forms amovable wall for the gripper,

an eccentric for moving the block'orsection I and means for adjusting the extent of move- :ment. of the block bythe eccentric. f

2. A devi'ce ofthe class described-compris a i block or section movably arranged "inthe opening, a'screw shaft; carried by the block, b means permitting turning movementof the I shaft, a cross headiii-thesupport and en-t gaging the. outer end of the shaft' an'eccen-f tric shaft in the support and an eccentric I thereon engaging the crosshead. f

In testimony whereof I aflix my signature. 1

1 ALFREDBURGE; 

